Meanwhile, the company said remaining assets had been moved to a cold wallet to be stored in a more secure environment that is not accessible via the internet.

Although Bithumb might not be keen to advertise the loss, deleting its initial tweet announcing the hack and promise of compensation.

Cybercriminals haven't been very kind to South Korea's cryptoexchanges recently.

Tokens including Ardor, Ethos, Polymath, and Aion have continued their downward trend against both Bitcoin and the USA dollar, triggered by the Bithumb hack and increasing negativity surrounding the cryptocurrency market of South Korea. Another South Korean exchange - Youbit - filed for bankruptcy in December past year after losing 17 percent of its assets in a heist. Last week, another South Korean cryptocurrency exchange, Coinrail, was also hacked. Bithumb's own offices were raided in January as part of a larger clampdown.

Bithumb did not reveal any details about this latest hack, such as what cryptocurrency the hackers stole, how they got into their IT system, or how they exfiltrated funds. If they respond, we will update the story accordingly.